Activating/deactivating

WARNING WARNING

Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others.

The rear window defroster has a high current draw. You should therefore switch it off as soon as the window is clear as it only switches off automatically after several minutes. If the battery voltage is too low, the rear window defroster may switch off.

  • Turn the SmartKey to position 2 in the ignition lock.
  • Press the lamp in the  button lights up or button. The indicator lamp in the goes out. button lights up or goes out.
    See also:

    Hazard warning lamps
    The hazard warning lamps automatically switch on if: • an air bag is deployed. • the vehicle is slowed down severely from a speed of over 45 mph(70 km/h) and comes to a halt. To switch ...

    Utility
    With all that power under the M-Class' hood, along with its sporty nature and comfortable cabin, it's easy to forget this is still an SUV. That means the M-Class better do a good job of hauling th ...

    Important safety notes
    We recommend that all infants and children be properly secured in an infant or child restraint system at all times while the vehicle is in motion. The use of seat belts and infant and child restrai ...